export const member3 = () => {
  let num = 75;
  let str = "我是胡煜鹏爹地";
  if (num >= 90) {
  } else if (num >= 80 && num < 90) {
    console.log("成绩是优秀");
  } else if (num >= 70 && num < 80) {
    console.log("成绩是良好");
  } else if (num >= 60 && num < 70) {
    console.log("成绩是及格");
  } else {
    console.log("成绩是不及格");
  }
  return str;
};
